Question

Tom is tall, but his sisters, Mary and Kathy, short. A...

Tom is tall, but his sisters, Mary and Kathy, short. A．are both B．all are C．are all D．both are

Answer 1

A

试题分析：根据英语中副词应放在助动词之后，实意动词之前的用法，可将BD排除；又根据前面的Mary and Kathy可知，应该是两者，故用both。所以本题选A。 点评：做本题时，需要注意两点，一是副词的位置（如all both、never、ever等）；一是注意both和all的用法。All是指三者或三者以上，而both是指两者。